Three-dimensional shaping device and method of shaping three-dimensional shaped article

A three-dimensional shaping device comprising:

• a melting section configured to melt a material to generate a shaping material;
• a supply flow channel which is communicated with the melting section, and through which the shaping material flows;
• a nozzle communicated with the supply flow channel and configured to eject the shaping material;
• an ejection amount control mechanism provided to the supply flow channel, and configured to control a flow amount of the shaping material to be ejected from the nozzle;
• a branch flow channel branched from a first partial flow channel as a flow channel between the melting section and the ejection amount control mechanism out of the supply flow channel, and communicated with a second partial flow channel as a flow channel between the ejection amount control mechanism and the nozzle out of the supply flow channel;
• a transfer mechanism configured to transfer the shaping material in the second partial flow channel to the first partial flow channel via the branch flow channel;
• and
• a control section configured to control the ejection amount control mechanism and the transfer mechanism, wherein
• the control section is configured to control the transfer mechanism to transfer the shaping material in the second partial flow channel to the first partial flow channel in a period obtained by summing a first period from controlling the ejection amount control mechanism to stop ejection of the shaping material from the nozzle to controlling the ejection amount control mechanism to resume the ejection of the shaping material from the nozzle, and a second period after controlling the ejection amount control mechanism to resume the ejection of the shaping material from the nozzle and before controlling the ejection amount control mechanism to stop ejection of the shaping material from the nozzle a second time.